Elon Musk has agreed to testify in the US Securities and Exchange Commission’s probe of his 2022 acquisition of the social-media platform once known as Twitter.The billionaire will sit for a five-hour deposition after dropping his plan to appeal a court order that he comply with a government subpoena, according to a filing Thursday in San Francisco federal court. The regulator is seeking information about Musk’s purchases of Twitter stock and statements about his investments before he spent $44 ...